CN110018808A - A kind of sound quality adjusting method and device - Google Patents
A kind of sound quality adjusting method and device Download PDFInfo
- Publication number
- CN110018808A CN110018808A CN201811588256.3A CN201811588256A CN110018808A CN 110018808 A CN110018808 A CN 110018808A CN 201811588256 A CN201811588256 A CN 201811588256A CN 110018808 A CN110018808 A CN 110018808A
- Authority
- CN
- China
- Prior art keywords
- signal
- recursive filter
- sound
- preset
- audio
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 39
- 230000000694 effects Effects 0.000 claims abstract description 57
- 230000005236 sound signal Effects 0.000 claims abstract description 54
- 230000004044 response Effects 0.000 claims abstract description 47
- 238000012545 processing Methods 0.000 claims abstract description 46
- 230000003321 amplification Effects 0.000 claims description 27
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 27
- 230000009467 reduction Effects 0.000 claims description 11
- 230000002265 prevention Effects 0.000 claims description 8
- 230000001965 increasing effect Effects 0.000 claims description 7
- 238000005086 pumping Methods 0.000 abstract 2
- 230000001629 suppression Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 11
- 230000008859 change Effects 0.000 description 10
- 238000013461 design Methods 0.000 description 10
- 230000006872 improvement Effects 0.000 description 8
- 230000005284 excitation Effects 0.000 description 7
- 230000006870 function Effects 0.000 description 7
- 230000002708 enhancing effect Effects 0.000 description 6
- 230000001052 transient effect Effects 0.000 description 6
- 230000001755 vocal effect Effects 0.000 description 6
- 238000001914 filtration Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000013507 mapping Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003909 pattern recognition Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G5/00—Tone control or bandwidth control in amplifiers
- H03G5/16—Automatic control
- H03G5/165—Equalizers; Volume or gain control in limited frequency bands
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/16—Sound input; Sound output
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
- H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
- H03G9/025—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers frequency-dependent volume compression or expansion, e.g. multiple-band systems
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/001—Monitoring arrangements; Testing arrangements for loudspeakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G2201/00—Indexing scheme relating to subclass H03G
- H03G2201/10—Gain control characterised by the type of controlled element
- H03G2201/103—Gain control characterised by the type of controlled element being an amplifying element
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Acoustics & Sound (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Theoretical Computer Science (AREA)
- Multimedia (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Circuit For Audible Band Transducer (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The present embodiments relate to Audio Signal Processing fields, disclose a kind of sound quality adjusting method, comprising: obtain audio signal to be adjusted；Obtain the resonance frequency and frequency response curve of the driver；It forms recursion filter and determines the filter parameter of the recursion filter according to the frequency response curve；The audio signal to be adjusted is inputted in the recursion filter in the preset range of the resonance frequency, obtains equalizing signal；The equalizing signal is subjected to default audio effect processing, obtains to pumping signal, inputs the equalizing signal in the nonrecursive filter wherein the default audio effect processing includes at least；It described will input in the driver to pumping signal with output audio signal.The present invention also provides a kind of audio quality adjustment devices.Sound quality adjusting method and device provided by the invention can enhance effectiveness in vibration suppression, improve screen sounding sound quality.
Description
Technical Field
The embodiment of the invention relates to the field of audio signal processing, in particular to a tone quality adjusting method and device.
Background
The screen sounding smart phone is a smart phone which enables the function of a receiver to be perfectly integrated with an IPS high-definition screen, a receiver sounding hole does not need to be formed in the front face of the mobile phone, and when a piezoelectric driver is powered on to work, a mobile phone touch screen generates vibration along with the receiver sounding hole, so that air is pushed to generate sound. The design mode not only facilitates the answering of the user, but also enables the conversation effect to be clearer, and the earphone structure is revolutionarily cancelled on the smart phone, so that the full-mirror design of the smart phone is realized, and the front waterproof and dustproof functions of the smart phone can be realized. The screen sounding smart phone needs to apply a screen sounding technology, and the screen sounding technology is a technology that an exciter is placed behind a screen, vibration is generated by driving the exciter and transmitted to the screen, and the screen vibrates to sound.
The inventor finds that at least the following problems exist in the prior art: if the pronunciation and the music effect of screen sound production technique are not handled, can make the vibration effect of screen obvious, and can produce noise and change sound during the screen vibration and lead to tone quality to receive the influence to lead to causing user's sense of hearing experience effect not good.
Disclosure of Invention
An object of embodiments of the present invention is to provide a sound quality adjustment method and apparatus, which can enhance a vibration reduction effect and improve sound quality of screen sound.
In order to solve the above-mentioned technical problem, an embodiment of the present invention provides a sound quality adjustment method for a sound generating apparatus having an exciter, including: acquiring an audio signal to be adjusted; acquiring the resonant frequency and the frequency response curve of the exciter; forming a recursive filter and determining filter parameters of the recursive filter according to the frequency response curve; inputting the audio signal to be adjusted into the recursive filter within the preset range of the resonance frequency to obtain an equalization signal; performing preset sound effect processing on the equalized signal to obtain a signal to be excited, wherein the preset sound effect processing at least comprises inputting the equalized signal into the non-recursive filter; inputting the signal to be excited into the exciter to output an audio signal.
An embodiment of the present invention further provides a sound quality adjustment apparatus, including: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executable by the at least one processor to enable the at least one processor to perform the above-mentioned sound quality adjustment method.
Compared with the prior art, the implementation mode of the invention obtains the audio signal to be adjusted and the resonance frequency and the frequency response curve of the exciter, then forms a recursive filter, determines the filter parameters of the recursive filter according to the frequency response curve, inputs the audio signal to be adjusted into the recursive filter within the preset range of the resonance frequency to obtain an equalization signal, and performs equalization design by using the recursive filter within the preset range of the resonance frequency of the exciter, thereby avoiding the phenomenon of over-strong screen vibration and enhancing the vibration reduction effect; the filter parameters of the recursive filter are determined according to the frequency response curve, so that the audio loss of an exciter in a screen sounding device can be reduced; in addition, through predetermineeing the audio processing with balanced signal again, acquire and treat the excitation signal, wherein predetermine the audio processing at least including with balanced signal input among the non-recursive filter for the transient state linearity and the nonlinear response of exciter in screen sound generating device can improve, thereby the vocal tone quality of screen has been improved, make user's sense of hearing experience respond well, if the pronunciation and the music effect of having avoided "screen sound production technique do not handle, can make the vibration effect of screen obvious, and can produce noise and change sound during the screen vibration and lead to tone quality to receive the influence, thereby lead to the emergence of the not good condition of user's sense of hearing experience effect".
In addition, the preset sound effect processing also comprises the step of carrying out dynamic range adjustment on the signal output by the non-recursive filter to obtain a limit signal; the acquiring of the signal to be excited specifically includes: and taking the voltage limit signal as the signal to be excited. The signals output by the non-recursive filter are adjusted and controlled by using a dynamic range, and different gain amounts are matched according to each audio segment, so that the soft voltage limit of audio output is realized, and the effect of playing out volume is improved.
In addition, the preset sound effect processing also comprises the step of inputting the voltage limit signal into a low-pass filter and a high-pass filter to obtain a filtering signal; the acquiring of the signal to be excited specifically includes: and taking the filtered signal as the signal to be excited. By adding the low-pass filter and the high-pass filter, noise and noise can be better reduced, and the sound quality of a screen can be further improved.
In addition, the preset sound effect processing also comprises the steps of reducing voice and carrying out signal gain processing on the filtering signal so as to obtain a sound leakage prevention signal; the acquiring of the signal to be excited specifically includes: and taking the anti-noise signals as the signals to be excited. Based on the working mechanism of the sound production device, the sound effect software properly reduces the signal gain of voice and music, can reduce sound leakage, and further improves the sound production tone quality of the screen.
In addition, the preset sound effect processing also comprises the function of amplifying the sound leakage prevention signals; the acquiring of the signal to be excited specifically includes: and taking the anti-sound-leakage signal with the amplified efficacy as the signal to be excited.
In addition, inputting the audio signal to be adjusted into the recursive filter within the preset range of the resonant frequency to obtain an equalized signal, specifically including: performing audio adjustments to an equalizer of the recursive filter; inputting the audio signal to be adjusted into the recursive filter with the adjusted audio within the preset range of the resonance frequency to obtain an equalization signal; the efficacy of amplifying the sound leakage prevention signal specifically comprises: and amplifying the sound leakage preventing signal according to the preset voltage and the preset power amplification factor.
In addition, the preset voltage is smaller than the maximum voltage of the recursive filter, and the preset power amplification multiple is smaller than the maximum power amplification multiple; the audio adjustment of the equalizer of the recursive filter specifically includes: and setting the low frequency and the medium-high frequency of the equalizer in an equalizing manner so that the difference between the low frequency and the medium-high frequency is within a preset range.
In addition, the preset voltage is smaller than the maximum voltage of the recursive filter, and the preset power amplification multiple is smaller than the maximum power amplification multiple; the audio adjustment of the equalizer of the recursive filter specifically includes: and increasing the low frequency of the equalizer to a first preset threshold value, and reducing the medium-high frequency of the equalizer to a second preset threshold value.
In addition, the preset voltage is the maximum voltage of the recursive filter, and the preset power amplification multiple is the maximum power amplification multiple; the audio adjustment of the equalizer of the recursive filter specifically includes: reducing the low frequency of the equalizer to a third preset threshold, increasing the medium-high frequency of the equalizer to a fourth preset threshold, and reducing the bandwidth of the equalizer to a fifth preset threshold.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a flowchart of a sound quality adjustment method according to a first embodiment of the present invention;
fig. 2 is a flowchart of a sound quality adjustment method according to a second embodiment of the present invention;
fig. 3 is a flowchart of a sound quality adjustment method according to a third embodiment of the present invention;
fig. 4 is a flowchart of a sound quality adjustment method according to a fourth embodiment of the present invention;
fig. 5 is a flowchart of a sound quality adjustment method according to a fifth embodiment of the present invention;
fig. 6 is an internal block diagram of a sound emitting device according to a fifth embodiment of the present invention;
fig. 7 is a schematic structural diagram of a sound quality adjustment apparatus according to a sixth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present invention in its various embodiments. However, the technical solution claimed in the present invention can be implemented without these technical details and various changes and modifications based on the following embodiments.
A first embodiment of the present invention relates to a sound quality adjustment method for a sound generating apparatus having an exciter, and is characterized in that: acquiring an audio signal to be adjusted; acquiring the resonant frequency and the frequency response curve of the exciter; forming a recursive filter and determining filter parameters of the recursive filter according to the frequency response curve; inputting the audio signal to be adjusted into the recursive filter within the preset range of the resonance frequency to obtain an equalization signal; performing preset sound effect processing on the equalized signal to obtain a signal to be excited, wherein the preset sound effect processing at least comprises inputting the equalized signal into a non-recursive filter; inputting the signal to be excited into the exciter to output an audio signal. The following is a detailed description of the implementation details of the sound quality adjustment method according to the present embodiment, and the following is provided only for the convenience of understanding, and is not necessary to implement the present embodiment, and as shown in fig. 1, the implementation details include:
s101: and acquiring an audio signal to be adjusted.
In step S101, specifically, during the call, the sound source sends out an audio signal, which is the audio signal to be adjusted.
S102: and acquiring the resonant frequency and the frequency response curve of the exciter.
In step S102, specifically, the resonant frequency of the exciter can be obtained according to the characteristic of the exciter itself, and the frequency response curve of the exciter in the screen sounding device can be measured according to the step signal excitation.
S103: a recursive filter is formed and filter parameters of the recursive filter are determined from the frequency response curve.
Regarding step S103, specifically, the recursive filter is a filter in signal processing, which uses one or more output signals as its input. Such filters typically produce an impulse response of infinite length (commonly referred to as an infinite impulse response, IIR for short) and are characterized by an exponential growth or an exponential decay.
S104: and inputting the audio signal to be adjusted into the recursive filter within the preset range of the resonant frequency to obtain an equalization signal.
In step S104, specifically, according to the characteristics of the exciter itself, EQ (equalization) design is performed using an IIR filter for the vicinity of the resonant frequency F0 (i.e., a preset range) so as not to cause the phenomenon of excessive vibration. In this embodiment, the audio signal to be adjusted is input into the recursive filter within the preset range of the resonant frequency to obtain the equalization signal, which may be: performing audio adjustments to an equalizer of the recursive filter; and inputting the audio signal to be adjusted into the recursive filter with the adjusted audio within the preset range of the resonance frequency to obtain an equalization signal.
S105: and inputting the balanced signal into a non-recursive filter to obtain a signal to be excited.
In step S105, specifically, the equalized signal is input into the non-recursive filter, and an equalized compensation signal is obtained, where the equalized compensation signal is the signal to be excited. The non-recursive filter, also called as finite-length single-bit impulse response filter, is the most basic element in a digital signal processing system, and can ensure any amplitude-frequency characteristic and simultaneously have strict linear phase-frequency characteristic, and the unit sampling response of the filter is finite-length, so that the filter is a stable system. Therefore, non-recursive filter filters are widely used in the fields of communications, image processing, pattern recognition, and the like.
S106: a signal to be excited is input into the exciter to output an audio signal.
As for step S106, the exciter is specifically a harmonic generator, and is an acoustic processing device for modifying and beautifying the sound signal by using the psychoacoustic characteristics of a human. By adding high-frequency harmonic components to sound, the tone quality and tone color can be improved, the penetration of sound can be improved, and the spatial sense of sound can be increased. The modern exciter not only can create high-frequency harmonic waves, but also has the functions of low-frequency expansion, music style and the like, so that the bass effect is more perfect, and the music has more expressive force.
Compared with the prior art, the implementation mode of the invention obtains the audio signal to be adjusted and the resonance frequency and the frequency response curve of the exciter, then forms a recursive filter, determines the filter parameters of the recursive filter according to the frequency response curve, inputs the audio signal to be adjusted into the recursive filter within the preset range of the resonance frequency to obtain an equalization signal, and performs equalization design by using the recursive filter within the preset range of the resonance frequency of the exciter, thereby avoiding the phenomenon of over-strong screen vibration and enhancing the vibration reduction effect; the filter parameters of the recursive filter are determined according to the frequency response curve, so that the audio loss of an exciter in a screen sounding device can be reduced; in addition, through predetermineeing the audio processing with balanced signal again, acquire and treat the excitation signal, wherein predetermine the audio processing at least including with balanced signal input among the non-recursive filter for the transient state linearity and the nonlinear response of exciter in screen sound generating device can improve, thereby the vocal tone quality of screen has been improved, make user's sense of hearing experience respond well, if the pronunciation and the music effect of having avoided "screen sound production technique do not handle, can make the vibration effect of screen obvious, and can produce noise and change sound during the screen vibration and lead to tone quality to receive the influence, thereby lead to the emergence of the not good condition of user's sense of hearing experience effect".
A second embodiment of the present invention relates to a sound quality adjustment method, and the second embodiment is a further improvement on the first embodiment, and the specific improvement is that: in a second embodiment, the pre-sound effect processing further includes performing dynamic range adjustment on the signal output by the non-recursive filter to obtain a threshold signal; the acquiring of the signal to be excited specifically includes: and taking the voltage limit signal as the signal to be excited. The signals output by the non-recursive filter are adjusted and controlled by using a dynamic range, different gain amounts are matched according to each audio segment, so that the soft voltage limit of audio output is realized, the volume effect of external amplification is improved, and the condition that the signal level changes strongly to cause exceeding of the limit of an amplifier and distortion is effectively prevented
As shown in fig. 2, a specific flow of the present embodiment includes:
s201: and acquiring an audio signal to be adjusted.
S202: and acquiring the resonant frequency and the frequency response curve of the exciter.
S203: a recursive filter is formed and filter parameters of the recursive filter are determined from the frequency response curve.
S204: and inputting the audio signal to be adjusted into the recursive filter within the preset range of the resonant frequency to obtain an equalization signal.
S205: and inputting the equalized signal into a non-recursive filter to obtain an equalized compensation signal.
S206: and adjusting the dynamic range of the balanced compensation signal to obtain a voltage limit signal, and taking the voltage limit signal as a signal to be excited.
In step S206, specifically, the dynamic range control is widely applied in the field of audio signal processing, and is to map the dynamic range of the input audio signal to a specified dynamic range, and the dynamic range after mapping is usually smaller than the dynamic range before mapping, so the dynamic range control is also called dynamic range compression.
S207: a signal to be excited is input into the exciter to output an audio signal.
Steps S201 to S205 and S207 in this embodiment are similar to steps S101 to S106 in the first embodiment, and are not repeated here to avoid repetition.
Compared with the prior art, the implementation mode of the invention obtains the audio signal to be adjusted and the resonance frequency and the frequency response curve of the exciter, then forms a recursive filter, determines the filter parameters of the recursive filter according to the frequency response curve, inputs the audio signal to be adjusted into the recursive filter within the preset range of the resonance frequency to obtain an equalization signal, and performs equalization design by using the recursive filter within the preset range of the resonance frequency of the exciter, thereby avoiding the phenomenon of over-strong screen vibration and enhancing the vibration reduction effect; the filter parameters of the recursive filter are determined according to the frequency response curve, so that the audio loss of an exciter in a screen sounding device can be reduced; in addition, through predetermineeing the audio processing with balanced signal again, acquire and treat the excitation signal, wherein predetermine the audio processing at least including with balanced signal input among the non-recursive filter for the transient state linearity and the nonlinear response of exciter in screen sound generating device can improve, thereby the vocal tone quality of screen has been improved, make user's sense of hearing experience respond well, if the pronunciation and the music effect of having avoided "screen sound production technique do not handle, can make the vibration effect of screen obvious, and can produce noise and change sound during the screen vibration and lead to tone quality to receive the influence, thereby lead to the emergence of the not good condition of user's sense of hearing experience effect".
A third embodiment of the present invention relates to a sound quality adjustment method, and is a further improvement on the second embodiment, and the specific improvement is that: in a third embodiment, the preset sound effect processing further includes inputting the threshold signal into a low-pass filter and a high-pass filter to obtain a filtered signal; the acquiring of the signal to be excited specifically includes: and taking the filtered signal as the signal to be excited. By adding the low-pass filter and the high-pass filter, noise and noise can be better reduced, and the sound quality of a screen can be further improved.
As shown in fig. 3, a specific flow of the present embodiment includes:
s301: and acquiring an audio signal to be adjusted.
S302: and acquiring the resonant frequency and the frequency response curve of the exciter.
S303: a recursive filter is formed and filter parameters of the recursive filter are determined from the frequency response curve.
S304: and inputting the audio signal to be adjusted into the recursive filter within the preset range of the resonant frequency to obtain an equalization signal.
S305: and inputting the equalized signal into a non-recursive filter to obtain an equalized compensation signal.
S306: and adjusting the dynamic range of the balanced compensation signal to obtain a voltage limit signal.
S307: and inputting the voltage limit signal into a low-pass filter and a high-pass filter to obtain a filtering signal, and taking the filtering signal as a signal to be excited.
Regarding step S307, specifically, the low-pass filter is an electronic filter device that allows a signal lower than the cutoff frequency to pass, but does not allow a signal higher than the cutoff frequency to pass; a high-pass filter, also called a low-cut filter or a low-cut filter, is a filter that allows frequencies higher than a certain cut frequency to pass through, while significantly attenuating lower frequencies. Which removes unnecessary low frequency components or low frequency interference from the signal.
S308: a signal to be excited is input into the exciter to output an audio signal.
Steps S301 to S306 and S308 in this embodiment are similar to steps S201 to S207 in the second embodiment, and are not repeated here to avoid repetition.
Compared with the prior art, the implementation mode of the invention obtains the audio signal to be adjusted and the resonance frequency and the frequency response curve of the exciter, then forms a recursive filter, determines the filter parameters of the recursive filter according to the frequency response curve, inputs the audio signal to be adjusted into the recursive filter within the preset range of the resonance frequency to obtain an equalization signal, and performs equalization design by using the recursive filter within the preset range of the resonance frequency of the exciter, thereby avoiding the phenomenon of over-strong screen vibration and enhancing the vibration reduction effect; the filter parameters of the recursive filter are determined according to the frequency response curve, so that the audio loss of an exciter in a screen sounding device can be reduced; in addition, through predetermineeing the audio processing with balanced signal again, acquire and treat the excitation signal, wherein predetermine the audio processing at least including with balanced signal input among the non-recursive filter for the transient state linearity and the nonlinear response of exciter in screen sound generating device can improve, thereby the vocal tone quality of screen has been improved, make user's sense of hearing experience respond well, if the pronunciation and the music effect of having avoided "screen sound production technique do not handle, can make the vibration effect of screen obvious, and can produce noise and change sound during the screen vibration and lead to tone quality to receive the influence, thereby lead to the emergence of the not good condition of user's sense of hearing experience effect".
A fourth embodiment of the present invention relates to a sound quality adjustment method, and is a further improvement on the third embodiment, and the specific improvements are as follows: in a fourth embodiment, the preset sound effect processing further comprises performing voice reduction and signal gain processing on the filtered signal to obtain a sound leakage prevention signal; the acquiring of the signal to be excited specifically includes: and taking the anti-noise signals as the signals to be excited. Based on the working mechanism of the sound production device, the sound effect software properly reduces the signal gain of voice and music, can reduce sound leakage, and further improves the sound production tone quality of the screen.
As shown in fig. 4, a specific flow of the present embodiment includes:
s401: and acquiring an audio signal to be adjusted.
S402: and acquiring the resonant frequency and the frequency response curve of the exciter.
S403: a recursive filter is formed and filter parameters of the recursive filter are determined from the frequency response curve.
S404: and inputting the audio signal to be adjusted into the recursive filter within the preset range of the resonant frequency to obtain an equalization signal.
S405: and inputting the equalized signal into a non-recursive filter to obtain an equalized compensation signal.
S406: and adjusting the dynamic range of the balanced compensation signal to obtain a voltage limit signal.
S407: and inputting the voltage limit signal into a low-pass filter and a high-pass filter to obtain a filtered signal.
S408: and carrying out voice reduction and signal gain processing on the filtered signal to obtain a sound leakage preventing signal, and taking the sound leakage preventing signal as a signal to be excited.
In step S408, specifically, based on the operation mechanism of the screen sound device, in order to reduce the sound leakage, the sound effect software needs to properly reduce the signal gain of the voice and music.
S409: a signal to be excited is input into the exciter to output an audio signal.
Steps S401 to S407 and S409 in this embodiment are similar to steps S301 to S308 in the third embodiment, and are not repeated here to avoid redundancy.
Compared with the prior art, the implementation mode of the invention obtains the audio signal to be adjusted and the resonance frequency and the frequency response curve of the exciter, then forms a recursive filter, determines the filter parameters of the recursive filter according to the frequency response curve, inputs the audio signal to be adjusted into the recursive filter within the preset range of the resonance frequency to obtain an equalization signal, and performs equalization design by using the recursive filter within the preset range of the resonance frequency of the exciter, thereby avoiding the phenomenon of over-strong screen vibration and enhancing the vibration reduction effect; the filter parameters of the recursive filter are determined according to the frequency response curve, so that the audio loss of an exciter in a screen sounding device can be reduced; in addition, through predetermineeing the audio processing with balanced signal again, acquire and treat the excitation signal, wherein predetermine the audio processing at least including with balanced signal input among the non-recursive filter for the transient state linearity and the nonlinear response of exciter in screen sound generating device can improve, thereby the vocal tone quality of screen has been improved, make user's sense of hearing experience respond well, if the pronunciation and the music effect of having avoided "screen sound production technique do not handle, can make the vibration effect of screen obvious, and can produce noise and change sound during the screen vibration and lead to tone quality to receive the influence, thereby lead to the emergence of the not good condition of user's sense of hearing experience effect".
A fifth embodiment of the present invention relates to a sound quality adjustment method, and is a further improvement of the fourth embodiment, and the specific improvements are as follows: in a fifth embodiment, the preset sound effect processing further comprises power amplification of the sound leakage prevention signal; the acquiring of the signal to be excited specifically includes: and taking the anti-sound-leakage signal with the amplified efficacy as the signal to be excited.
As shown in fig. 5, a specific flow of the present embodiment includes:
s501: and acquiring an audio signal to be adjusted.
S502: and acquiring the resonant frequency and the frequency response curve of the exciter.
S503: a recursive filter is formed and filter parameters of the recursive filter are determined from the frequency response curve.
S504: and inputting the audio signal to be adjusted into the recursive filter within the preset range of the resonant frequency to obtain an equalization signal.
S505: and inputting the equalized signal into a non-recursive filter to obtain an equalized compensation signal.
S506: and adjusting the dynamic range of the balanced compensation signal to obtain a voltage limit signal.
S507: and inputting the voltage limit signal into a low-pass filter and a high-pass filter to obtain a filtered signal.
S508: and carrying out voice reduction and signal gain processing on the filtered signal to obtain a sound leakage preventing signal.
S509: the anti-sound-leakage signal is amplified by the efficacy, and the anti-sound-leakage signal after the efficacy is amplified is used as a signal to be excited.
In step S509, the power amplifier amplifies the weak signal from the sound source or the preamplifier to push the speaker to play sound, and thus a good set of sound system power amplifier is not available. The function of the sound leakage prevention signal amplification in the embodiment specifically comprises: and amplifying the sound leakage preventing signal according to the preset voltage and the preset power amplification factor.
S510: a signal to be excited is input into the exciter to output an audio signal.
Steps S501 to S508 and S510 in this embodiment are similar to steps S401 to S409 in the fourth embodiment, and are not repeated here to avoid redundancy.
It is worth mentioning that different emphasis can be carried out in the debugging process of the sound generating device to meet the sound effect requirements of different screen sound generating devices, and the method specifically comprises the following steps:
(1) high sound quality and strong reducibility
And setting preset voltage to be less than the maximum voltage of the recursive filter, setting preset power amplification times to be less than the maximum power amplification times, and setting the low frequency and the medium-high frequency of the equalizer in an equalizing manner so that the difference between the low frequency and the medium-high frequency is within a preset range. That is, a certain margin is left in the maximum gain of the power amplifier, the maximum voltage output is not used, and the change rate of the amplification factor is relatively gentle; no signal clipping is allowed to occur; the EQ settings are more balanced.
(2) Require full bass
Setting a preset voltage to be less than the maximum voltage of the recursive filter, and setting a preset power amplification multiple to be less than the maximum power amplification multiple; and increasing the low frequency of the equalizer to a first preset threshold value, and reducing the medium-high frequency of the equalizer to a second preset threshold value. That is, a certain margin is left in the maximum gain of the power amplifier, the maximum voltage output is not used, and the change rate of the amplification factor is relatively gentle; no signal clipping is allowed to occur; EQ sets up the appropriate boost low frequency, high medium to high frequency.
(3) Require high volume
Setting a preset voltage as the maximum voltage of the recursive filter, and setting a preset power amplification multiple as a maximum power amplification multiple; reducing the low frequency of the equalizer to a third preset threshold, increasing the medium-high frequency of the equalizer to a fourth preset threshold, and reducing the bandwidth of the equalizer to a fifth preset threshold. That is, the maximum gain of the power amplifier is as large as possible, the maximum voltage output is used, and the change rate of the amplification factor is accelerated; allowing proper signal clipping to occur; EQ sets proper low voltage and high frequency, and raises middle and high frequency, and properly reduces bandwidth.
As shown in fig. 6, the internal circuit block diagram of the screen sound generating apparatus according to the present embodiment includes a Digital Signal Processor (DSP)1, a power amplifier 2, and an actuator 3. For the sake of easy understanding, the following describes the operation principle of the sound generating device in this embodiment:
during the conversation, the sound source sends out an audio signal, and the audio signal is provided to the exciter 3 through the digital signal processor 1 and the amplifier 2. Specifically, sound effect processing such as sound filtering and equalization design, DRC (dynamic range control), and the like is performed on the signal in the digital signal processor 1. It can be understood that a conventional audio power amplifier chip is selected, the maximum output voltage Vmax is required to be not less than 7Vp (peak voltage), and the output power is required to be not less than 1W; the exciter 3 needs to be installed tightly against the screen, and installation gaps are reserved around the exciter to ensure that peripheral devices are not touched, gaps are reserved on the top surface, or certain pre-pressure is applied to the upper parts of the devices by using foam.
Compared with the prior art, the implementation mode of the invention obtains the audio signal to be adjusted and the resonance frequency and the frequency response curve of the exciter, then forms a recursive filter, determines the filter parameters of the recursive filter according to the frequency response curve, inputs the audio signal to be adjusted into the recursive filter within the preset range of the resonance frequency to obtain an equalization signal, and performs equalization design by using the recursive filter within the preset range of the resonance frequency of the exciter, thereby avoiding the phenomenon of over-strong screen vibration and enhancing the vibration reduction effect; the filter parameters of the recursive filter are determined according to the frequency response curve, so that the audio loss of an exciter in a screen sounding device can be reduced; in addition, through predetermineeing the audio processing with balanced signal again, acquire and treat the excitation signal, wherein predetermine the audio processing at least including with balanced signal input among the non-recursive filter for the transient state linearity and the nonlinear response of exciter in screen sound generating device can improve, thereby the vocal tone quality of screen has been improved, make user's sense of hearing experience respond well, if the pronunciation and the music effect of having avoided "screen sound production technique do not handle, can make the vibration effect of screen obvious, and can produce noise and change sound during the screen vibration and lead to tone quality to receive the influence, thereby lead to the emergence of the not good condition of user's sense of hearing experience effect".
A sixth embodiment of the present invention relates to a sound quality adjustment device, as shown in fig. 7, including:
at least one processor 601; and the number of the first and second groups,
a memory 602 communicatively coupled to the at least one processor 601; wherein,
the memory 602 stores instructions executable by the at least one processor 601, the instructions being executable by the at least one processor 601 to enable the at least one processor 601 to perform the above-described tone quality adjustment method.
Where the memory 602 and the processor 601 are coupled by a bus, the bus may comprise any number of interconnected buses and bridges that couple one or more of the various circuits of the processor 601 and the memory 602 together. The bus may also connect various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface provides an interface between the bus and the transceiver. The transceiver may be one element or a plurality of elements, such as a plurality of receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The data processed by the processor 601 is transmitted over a wireless medium via an antenna, which further receives the data and transmits the data to the processor 601.
The processor 601 is responsible for managing the bus and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. While memory 602 may be used to store data used by processor 601 in performing operations.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (10)
1. A sound quality adjustment method for a sound generating apparatus having an exciter, comprising:
acquiring an audio signal to be adjusted;
acquiring the resonant frequency and the frequency response curve of the exciter;
forming a recursive filter and determining filter parameters of the recursive filter according to the frequency response curve;
inputting the audio signal to be adjusted into the recursive filter within the preset range of the resonance frequency to obtain an equalization signal;
performing preset sound effect processing on the equalized signal to obtain a signal to be excited, wherein the preset sound effect processing at least comprises inputting the equalized signal into a non-recursive filter;
inputting the signal to be excited into the exciter to output an audio signal.
2. The method for adjusting sound quality according to claim 1, wherein the pre-sound effect processing further comprises performing dynamic range adjustment on the signal output by the non-recursive filter to obtain a threshold signal;
the acquiring of the signal to be excited specifically includes:
and taking the voltage limit signal as the signal to be excited.
3. The method for adjusting sound quality according to claim 2, wherein the pre-sound effect processing further comprises inputting the limit signal into a low-pass filter and a high-pass filter to obtain a filtered signal;
the acquiring of the signal to be excited specifically includes:
and taking the filtered signal as the signal to be excited.
4. The method for adjusting sound quality according to claim 3, wherein the preset sound effect processing further comprises performing speech reduction and signal gain processing on the filtered signal to obtain a sound leakage prevention signal;
the acquiring of the signal to be excited specifically includes:
and taking the anti-noise signals as the signals to be excited.
5. The method for adjusting sound quality according to claim 4, wherein the preset sound effect processing further comprises power amplifying the sound leakage preventing signal;
the acquiring of the signal to be excited specifically includes:
and taking the anti-sound-leakage signal with the amplified efficacy as the signal to be excited.
6. The method for adjusting sound quality according to claim 5, wherein inputting the audio signal to be adjusted into the recursive filter within the preset range of the resonance frequency to obtain an equalized signal comprises:
performing audio adjustments to an equalizer of the recursive filter;
inputting the audio signal to be adjusted into the recursive filter with the adjusted audio within the preset range of the resonance frequency to obtain an equalization signal;
the efficacy of amplifying the sound leakage prevention signal specifically comprises:
and amplifying the sound leakage preventing signal according to the preset voltage and the preset power amplification factor.
7. The method according to claim 6, wherein the predetermined voltage is smaller than a maximum voltage of the recursive filter, and the predetermined power amplification factor is smaller than a maximum power amplification factor;
the audio adjustment of the equalizer of the recursive filter specifically includes:
and setting the low frequency and the medium-high frequency of the equalizer in an equalizing manner so that the difference between the low frequency and the medium-high frequency is within a preset range.
8. The method according to claim 6, wherein the predetermined voltage is smaller than a maximum voltage of the recursive filter, and the predetermined power amplification factor is smaller than a maximum power amplification factor;
the audio adjustment of the equalizer of the recursive filter specifically includes:
and increasing the low frequency of the equalizer to a first preset threshold value, and reducing the medium-high frequency of the equalizer to a second preset threshold value.
9. The method according to claim 6, wherein the preset voltage is a maximum voltage of the recursive filter, and the preset power amplification factor is a maximum power amplification factor;
the audio adjustment of the equalizer of the recursive filter specifically includes:
reducing the low frequency of the equalizer to a third preset threshold, increasing the medium-high frequency of the equalizer to a fourth preset threshold, and reducing the bandwidth of the equalizer to a fifth preset threshold.
10. A sound quality adjusting apparatus, comprising:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the sound quality adjustment method of any one of claims 1 to 9.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811588256.3A CN110018808A (en) | 2018-12-25 | 2018-12-25 | A kind of sound quality adjusting method and device |
| PCT/CN2019/113336 WO2020134466A1 (en) | 2018-12-25 | 2019-10-25 | Sound quality adjustment method and device |
| US16/706,836 US10819305B2 (en) | 2018-12-25 | 2019-12-09 | Method and device for adjusting sound quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811588256.3A CN110018808A (en) | 2018-12-25 | 2018-12-25 | A kind of sound quality adjusting method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110018808A true CN110018808A (en) | 2019-07-16 |
Family
ID=67188675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811588256.3A Pending CN110018808A (en) | 2018-12-25 | 2018-12-25 | A kind of sound quality adjusting method and device |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US10819305B2 (en) |
| CN (1) | CN110018808A (en) |
| WO (1) | WO2020134466A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020134466A1 (en) * | 2018-12-25 | 2020-07-02 | 瑞声声学科技(深圳)有限公司 | Sound quality adjustment method and device |
| CN113840041A (en) * | 2020-06-24 | 2021-12-24 | 中兴通讯股份有限公司 | Echo cancellation device and method, pickup device and method, and terminal |
| CN114125089A (en) * | 2020-08-31 | 2022-03-01 | 北京小米移动软件有限公司 | Terminal device, signal processing method and device, and storage medium |
| WO2022166738A1 (en) * | 2021-02-08 | 2022-08-11 | 腾讯科技（深圳）有限公司 | Speech enhancement method and apparatus, and device and storage medium |
| WO2022165788A1 (en) * | 2021-02-07 | 2022-08-11 | 京东方科技集团股份有限公司 | Display apparatus, sound production control method, and parameter determination method and apparatus |
| WO2023000795A1 (en) * | 2021-07-23 | 2023-01-26 | 北京荣耀终端有限公司 | Audio playing method, failure detection method for screen sound-production device, and electronic apparatus |
| CN116860124A (en) * | 2023-09-04 | 2023-10-10 | 深圳市坤巨实业有限公司 | Noise control method and system for touch screen |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108874357B (en) * | 2018-06-06 | 2021-09-03 | 维沃移动通信有限公司 | Prompting method and mobile terminal |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102610229A (en) * | 2011-01-21 | 2012-07-25 | 安凯(广州)微电子技术有限公司 | Method, apparatus and device for audio dynamic range compression |
| JP5018339B2 (en) * | 2007-08-23 | 2012-09-05 | ソニー株式会社 | Signal processing apparatus, signal processing method, and program |
| CN105792072A (en) * | 2016-03-25 | 2016-07-20 | 腾讯科技（深圳）有限公司 | Sound effect processing method and device and terminal |
| CN107734167A (en) * | 2017-10-11 | 2018-02-23 | 深圳市金立通信设备有限公司 | A kind of vibration control method, terminal and computer-readable recording medium |
| CN108415556A (en) * | 2018-01-29 | 2018-08-17 | 瑞声科技(新加坡)有限公司 | Motor vibrations control method and device |
| CN108632708A (en) * | 2017-03-23 | 2018-10-09 | 展讯通信（上海）有限公司 | Loudspeaker output control method and system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8121312B2 (en) * | 2006-03-14 | 2012-02-21 | Harman International Industries, Incorporated | Wide-band equalization system |
| EP2901711B1 (en) * | 2012-09-24 | 2021-04-07 | Cirrus Logic International Semiconductor Limited | Control and protection of loudspeakers |
| EP3152919B1 (en) * | 2014-06-03 | 2020-02-19 | Dolby Laboratories Licensing Corporation | Passive and active virtual height filter systems for upward firing drivers |
| US10514883B2 (en) * | 2017-02-23 | 2019-12-24 | Rossum Electro-Music, LLC | Multi-channel morphing digital audio filter |
| CN110018808A (en) * | 2018-12-25 | 2019-07-16 | 瑞声科技(新加坡)有限公司 | A kind of sound quality adjusting method and device |
-
2018
- 2018-12-25 CN CN201811588256.3A patent/CN110018808A/en active Pending
-
2019
- 2019-10-25 WO PCT/CN2019/113336 patent/WO2020134466A1/en active Application Filing
- 2019-12-09 US US16/706,836 patent/US10819305B2/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5018339B2 (en) * | 2007-08-23 | 2012-09-05 | ソニー株式会社 | Signal processing apparatus, signal processing method, and program |
| CN102610229A (en) * | 2011-01-21 | 2012-07-25 | 安凯(广州)微电子技术有限公司 | Method, apparatus and device for audio dynamic range compression |
| CN105792072A (en) * | 2016-03-25 | 2016-07-20 | 腾讯科技（深圳）有限公司 | Sound effect processing method and device and terminal |
| CN108632708A (en) * | 2017-03-23 | 2018-10-09 | 展讯通信（上海）有限公司 | Loudspeaker output control method and system |
| CN107734167A (en) * | 2017-10-11 | 2018-02-23 | 深圳市金立通信设备有限公司 | A kind of vibration control method, terminal and computer-readable recording medium |
| CN108415556A (en) * | 2018-01-29 | 2018-08-17 | 瑞声科技(新加坡)有限公司 | Motor vibrations control method and device |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020134466A1 (en) * | 2018-12-25 | 2020-07-02 | 瑞声声学科技(深圳)有限公司 | Sound quality adjustment method and device |
| US10819305B2 (en) | 2018-12-25 | 2020-10-27 | AAC Technologies Pte. Ltd. | Method and device for adjusting sound quality |
| CN113840041A (en) * | 2020-06-24 | 2021-12-24 | 中兴通讯股份有限公司 | Echo cancellation device and method, pickup device and method, and terminal |
| WO2021258913A1 (en) * | 2020-06-24 | 2021-12-30 | 中兴通讯股份有限公司 | Echo cancellation device and method, sound pickup device and method, and terminal |
| CN114125089A (en) * | 2020-08-31 | 2022-03-01 | 北京小米移动软件有限公司 | Terminal device, signal processing method and device, and storage medium |
| CN114125089B (en) * | 2020-08-31 | 2024-09-10 | 北京小米移动软件有限公司 | Terminal device, signal processing method and device, and storage medium |
| WO2022165788A1 (en) * | 2021-02-07 | 2022-08-11 | 京东方科技集团股份有限公司 | Display apparatus, sound production control method, and parameter determination method and apparatus |
| CN115191120A (en) * | 2021-02-07 | 2022-10-14 | 京东方科技集团股份有限公司 | Display device, sound production control method, parameter determination method and device |
| US12133056B2 (en) | 2021-02-07 | 2024-10-29 | Beijing Boe Optoelectronics Technology Co., Ltd. | Display device, sound producing control method, parameter determining method and device |
| WO2022166738A1 (en) * | 2021-02-08 | 2022-08-11 | 腾讯科技（深圳）有限公司 | Speech enhancement method and apparatus, and device and storage medium |
| WO2023000795A1 (en) * | 2021-07-23 | 2023-01-26 | 北京荣耀终端有限公司 | Audio playing method, failure detection method for screen sound-production device, and electronic apparatus |
| CN116860124A (en) * | 2023-09-04 | 2023-10-10 | 深圳市坤巨实业有限公司 | Noise control method and system for touch screen |
| CN116860124B (en) * | 2023-09-04 | 2024-05-03 | 深圳市坤巨实业有限公司 | Noise control method and system for touch screen |
Also Published As
| Publication number | Publication date |
|---|---|
| US20200204135A1 (en) | 2020-06-25 |
| US10819305B2 (en) | 2020-10-27 |
| WO2020134466A1 (en) | 2020-07-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10819305B2 (en) | Method and device for adjusting sound quality | |
| US10165364B2 (en) | Linear resonant actuator controller | |
| EP2675063B1 (en) | Agc circuit with optimized reference signal energy levels for an echo cancelling circuit | |
| US10115412B2 (en) | Signal processor with side-tone noise reduction for a headset | |
| US8645144B2 (en) | Audio signal shaping for playback by audio devices | |
| US9674330B2 (en) | Method of improving sound quality of mobile communication terminal under receiver mode | |
| CN103686555B (en) | Miniature loudspeaker module group and method for enhancing frequency response of miniature loudspeaker module group, and electronic device | |
| EP2139264B1 (en) | Acoustic processing system and method for electronic device and mobile telephone terminal | |
| EP3528508A1 (en) | Headphone with noise cancellation of acoustic noise from tactile vibration driver and method | |
| CN104243732A (en) | Use of vibration sensor in acoustic echo cancellation | |
| JP6216803B2 (en) | Micro speaker module, method for enhancing frequency response thereof, and electronic apparatus | |
| CN108540895A (en) | Intelligent equalization device design method and noise cancelling headphone with intelligent equalization device | |
| US8965011B2 (en) | Automatic gain control circuit and method for automatic gain control | |
| RU2664717C2 (en) | Audio processing method and device | |
| CN102576560B (en) | electronic audio device | |
| US7010135B2 (en) | Method to determine a feedback threshold in a hearing device | |
| EP2595312B1 (en) | Automatic gain control circuit and method for automatic gain control | |
| CN108495237A (en) | A kind of amplitude gain control method of loudspeaker tonequality equilibrium | |
| US11527232B2 (en) | Applying noise suppression to remote and local microphone signals | |
| US20230087943A1 (en) | Active noise control method and system for headphone | |
| CN114743538A (en) | Telephone receiving compensation method suitable for active noise reduction | |
| JP2006173840A (en) | Sound output apparatus | |
| CN108810734A (en) | The control method and device of speaker system | |
| CN110545350A (en) | Method for increasing audio playing volume in mobile phone hands-free state |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190716 |
|
| RJ01 | Rejection of invention patent application after publication |